County annual report · FIPS 16015
2021 Boise County, ID Power Outage Report
In 2021, customers in Boise County, ID went without power for an average of 34.5 hours, a total of 121K customer-hours (Idaho average 5.7 hours). That ranks 4th worst of 43 Idaho counties and 264th of 2,974 nationally.
Compared with ID, the US and 2020
Coverage line is EAGLE-I's share of Idaho customers tracked each year.
Biggest outages in Boise County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 16, 2021 20:45 | September 16, 2021 21:30 | 45m | 11,045 | 4,499 |
| 2 | October 27, 2021 21:45 | October 27, 2021 23:30 | 1h 45m | 4,647 | 7,132 |
| 3 | December 13, 2021 15:15 | December 13, 2021 17:00 | 1h 45m | 4,302 | 3,266 |
| 4 | June 23, 2021 05:15 | June 24, 2021 01:15 | 20h | 3,306 | 9,441 |
| 5 | November 22, 2021 17:15 | November 22, 2021 21:00 | 3h 45m | 2,843 | 11K |
| 6 | December 14, 2021 20:45 | December 15, 2021 03:00 | 6h 15m | 2,417 | 5,168 |
| 7 | March 29, 2021 05:15 | March 30, 2021 01:15 | 20h | 2,336 | 15K |
| 8 | August 1, 2021 18:30 | August 1, 2021 18:45 | 15m | 2,261 | 565 |
| 9 | October 22, 2021 20:30 | October 22, 2021 21:00 | 30m | 1,830 | 473 |
| 10 | December 29, 2021 21:45 | December 30, 2021 18:30 | 20h 45m | 1,612 | 13K |
Outage episodes by size in 2021: 41 reached 100+ customers, 16 reached 1,000+ customers, 1 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Boise County reported on EIA Form 861 for 2021, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Idaho Power Co | 2021 | 3.1 hrs | 1.42 | 2.6 hrs | 1.25 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 90% of Idaho's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,491 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Boise County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Boise County, ID annual power outage report, 2021, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/idaho/boise-county